Low Duty LCD Segment Drivers - BU97981MUV

BU97981MUV is a 1/4, 1/3duty or Static general-purpose LCD driver that can be used for consumer / battery operated products and can drive up to 168 LCD Segments. It has integrated display RAM for reducing CPU load. Also, it is designed with low power consumption and no external component needed. It can support up to 27 general-purpose outputs to control LED devices and can control 3ch LED driver that able to support LED PWM illumination.Its small QFN package is well-suited for small footprint applications.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part Number
Unit Quantity
Minimum Package Quantity
Packing Type
Constitution Materials List
BU97981MUV-E2 Active VQFN56AV8080 1000 1000 Taping inquiry Yes
Grade Consumer
Segment Element 168
Duty 1/4, 1/3, Static
Bias 1/3, 1/2
Elements of MUX 1:1 42
Elements of MUX 1:3 126
Elements of MUX 1:4 168
Interface [line serial] 3wire
Interface Voltage (Min.)[V] 1.8
Interface Voltage (Max.)[V] 3.6
Max GPO [port] 27
LED Driver [port] 3
LCD Driving Waveform Line/Frame
Operating Temperature (Min.)[°C] -30
Operating Temperature (Max.)[°C] 75
    • 1/4, 1/3duty or Static setting selectable
      1/4duty driving: Max 168 segments
      1/3duty driving: Max 126 segments
      Static driving: Max 42 segments
    • 1/3 or 1/2 bias setting selectable
    • Power supply for Interface: 1.8V to 3.6V
    • Power supply for LCD: 2.7V to 5.5V
    • Integrated LCD voltage driving circuit
    • Integrated oscillation circuit for LCD frame frequency
    • Line or Frame inversion driving selectable
    • Integrated 27ch general purpose outputs
      (SEG selectable)
    • Integrated 3ch LED driver able to support 4096 step PWM illumination
    • Support individual blink function with dedicated blink RAM integrated
    • Support 3 wire serial interface
    • Support INHb terminal to control Display ON/OFF
    • Integrated voltage detected type power on reset circuit
    • No external components required
    • Low power consumption design
    • Small QFN package
Technical Data
Application Note

Thermal Resistance